Biology of Humans 4th Edition by Judith Goodenough,Betty McGuire

Exercise 3

Indira is a 25-year-old woman who has uterine polyps that cause heavy vaginal bleeding. She complains that she tires easily with physical activity and always feels fatigued. The doctor orders that a blood test be done to determine what percentage of her blood is red blood cells. Why? Would you expect the percentage to be higher or lower than normal? The doctor suggests that she take iron supplements. Why?